I wonder if microtransactions in big games like apex and genshin are down this year?

In Apex? Yes, and we know this from investor calls. Not sure about Genshin or Honkai, but even Fortnite is making less money. This appears to be an entire economy problem, not a video game problem. Perhaps related to inflation and consumers adapting their spending in response (a potential explanation I offer with no expertise to fall back on).